<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        div+span {
            color: brown;
           
        }
    </style>
</head>

<body>
    <div>
        <span>span1
            <span>span2
                <span>span3</span>
            </span>
        </span>
    </div>

</body>

</html>

<script>
let numbei1 = "5.5"
console.log(numbei1);

let numbei2=parseInt(numbei1);

console.log(numbei2);

</script>